fix(k1): stabilize live recovery and media admission

apps/control-station/test/devicePluginContracts.test.mjs

@@ -620,6 +620,53 @@ test("canonical K1 preparation stops before START and guards every async stage",
   );
 });
 
+test("K1 control-phase polling fails closed instead of stacking timed-out state reads", async () => {
+  const hookSource = await readFile(
+    new URL(
+      "../../../plugins/xgrids-k1/frontend/src/useXgridsK1Runtime.ts",
+      import.meta.url,
+    ),
+    "utf8",
+  );
+  const controlPollingLoop = hookSource.slice(
+    hookSource.indexOf("async function waitForControlPhase"),
+    hookSource.indexOf("async function waitForPhysicalReconciliationProof"),
+  );
+
+  assert.match(hookSource, /const CONTROL_PHASE_WAIT_TIMEOUT_MS = 120_000/);
+  assert.match(controlPollingLoop, /xgridsK1Api\.getState\(\)/);
+  assert.doesNotMatch(controlPollingLoop, /ApiRequestTimeoutError/);
+  assert.doesNotMatch(controlPollingLoop, /catch \(error\)/);
+  assert.doesNotMatch(
+    controlPollingLoop,
+    /(?:openApplicationControlSession|enterApplicationWorkspace|prepareAcquisition|startAcquisition|stopAcquisition)\(/,
+  );
+});
+
+test("K1 frontend coalesces concurrent read-only state requests without caching them", async () => {
+  const apiSource = await readFile(
+    new URL(
+      "../../../plugins/xgrids-k1/frontend/src/api.ts",
+      import.meta.url,
+    ),
+    "utf8",
+  );
+  const singleFlight = apiSource.slice(
+    apiSource.indexOf("let stateReadInFlight"),
+    apiSource.indexOf("export const xgridsK1Api"),
+  );
+  const getState = apiSource.slice(
+    apiSource.indexOf("async getState"),
+    apiSource.indexOf("scanBle("),
+  );
+
+  assert.match(singleFlight, /if \(stateReadInFlight\) return stateReadInFlight/);
+  assert.match(singleFlight, /invokeState\(xgridsK1Actions\.stateRead\)/);
+  assert.match(singleFlight, /stateReadInFlight === request[\s\S]*?stateReadInFlight = null/);
+  assert.match(getState, /return readStateSingleFlight\(\)/);
+  assert.doesNotMatch(singleFlight, /setTimeout|setInterval|retry/i);
+});
+
 test("K1 control-session CAS is exact, integer-only and mapped for each mutation family", () => {
   const state = {
     application_control_session: {